-15.71% is the change from 611 to 515
Calculation steps:
[( 515 - 611 ) ÷ 611] x 100 = -15.71%
Formula
Percentage change = [(515 - 611) / 611] x 100
Subtract the new number by the original number
515 - 611 = -96
-96 ÷ 611 = -0.15711947626841244
-0.15711947626841244 x 100 = -15.71%